Malicious PDF — malware analysis report

Static analysis result for SHA-256 59afcd1a83506a84…

MALICIOUS

PDF

84.5 KB Created: 2021-03-22 23:46:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 68e217e482f6eb07ab79b9c169a43c1b SHA-1: 8abf34afd9ec7d0ee1467c5c255c0dbb049d8b49 SHA-256: 59afcd1a83506a846797db31ed3fd7a7554475517e1531afa099178e90386ea8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many of which are to PDF files hosted on various platforms, suggesting a link farm or redirection mechanism. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The presence of embedded URLs points to the document's role in directing users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://maypoin.ru/wix?keyword=minecraft+1.6+4+mod+enchanting+plus
    • https://finirawex.weebly.com/uploads/1/3/2/7/132741073/40d266eb40.pdf
    • http://kufowawixapiva.sportsontheweb.net/rebod.pdf
    • https://vofamebibefa.weebly.com/uploads/1/3/4/6/134694090/d188e9b7f.pdf
    • https://mewifebobonopad.weebly.com/uploads/1/3/4/6/134625165/2159991.pdf
    • http://keniworu.mywebcommunity.org/asus_rt-ac66u_router_problems.pdf
    • http://gixipures.sportsontheweb.net/good_career_development_goals_examples_for_teachers.pdf
    • http://wapividazofar.scienceontheweb.net/85817587181.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/5a941cdd-1e68-42ee-9d72-6d4e370d98b5/faded_alan_walker_hop_world.pdf
    • http://vunojagona.rf.gd/nadonesarutibinebege.pdf
    • https://uploads.strikinglycdn.com/files/50316fae-63cc-42a6-b525-8b5fa23ac38c/29973166134.pdf
    • https://uploads.strikinglycdn.com/files/f56a6524-2dc3-4d16-9652-da066cacf6e8/jajefanodepijekimeloverok.pdf
    • http://bezepegu.epizy.com/zilatexinefafuvozuroli.pdf
    • http://gozefanilufi.epizy.com/how_do_i_change_hotmail_password_android.pdf
    • https://uploads.strikinglycdn.com/files/021fe8c4-c9b6-4ec3-aba8-3ee5beaeaead/ap_style_percent_sign_or_word.pdf
    • https://uploads.strikinglycdn.com/files/3baaebc2-d4a5-4bf5-87e8-9a6db9329043/mcsa_windows_server_2016_study_guide_exam_70-742.pdf
    • http://vatilibudavelit.rf.gd/st._augustine_confessions.pdf
    • http://duvodix.myartsonline.com/vevakapuroveritebuxetuk.pdf
    • https://uploads.strikinglycdn.com/files/3bb26bb0-4284-4f13-9a40-f67a61dbe0a8/dish_network_satellite_tv_installer_technician_job_description.pdf
    • https://uploads.strikinglycdn.com/files/e181ad0a-6462-4f66-b331-95039fab60e6/summary_of_the_story_an_astrologers_day.pdf
    • https://uploads.strikinglycdn.com/files/8b0914d3-b750-49c3-8159-0ebdade5e5c0/gujaxerunitosone.pdf
    • http://gugoxoxopuza.epizy.com/sql_basics_tutorial_point.pdf
    • https://uploads.strikinglycdn.com/files/bd2fd02b-0bec-4414-a1c6-2e810ab5efe7/tone_it_up_collagen_reviews.pdf
    • https://uploads.strikinglycdn.com/files/214f982b-ad23-4670-8968-54ab4c9970a4/pedal_para_violo_zoom_a2.pdf
    • http://tatikipebufufa.epizy.com/wepubisometageneserejul.pdf
    • http://zosetuguvajisu.epizy.com/decision_tree_implementation_in_python.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f66f.bin
3b2cad640b9c6499121b44b20a817b6cbdc28d031c22107ca266835388581af1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF66F 5900 bytes
font_01_sfnt_off00010a7d.bin
1ea8cd9b407261fc0a0ce74c3283970f7340b3c2a25fcac9ae7635d4527da1ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10A7D 10620 bytes
font_02_sfnt_off00012ef1.bin
0143f1303204e677e4f5ca9ddc1e3137fc305ad20a48f3e13082630f190f0e83		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12EF1 16064 bytes

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